Muffler.



N. RAPP.

MUFFLER.

APPLICATION FILED MAR. 25. 1915.

3; 1 Patenm 0st. 5

WITNESSES INVENTOR NATHANIEL RAPP, OF TOLEDO, OHIO.

MUFFLER.

Specification of Letters Patent.

Patented Oct. 5, 1915.

Application filed March 25, 1915. Serial No. 16,860.

To all whom it may concern:

Be it known that I, NATHANIEL RAPP, a citizen of the United States, anda resident of Toledo, in the county of Lucas and State of Ohio, haveinvented a certain new and useful Mufller; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to the characters of reference marked thereon, which form a part ofthis specification.

My invention relates to mufilers.

It has for its object to provide an eflicient mufiler for reducing theexplosive pulsating noise which is caused by the exhaust from explosionor internal combustion engines.

It is particularly adapted for use in connection with automobiles. Ithowever, may be used in connection with any form of an engine wherein itis desired to reduce the noise of the exhaust.

One of the objects of my invention is to provide an eflicient .mufiierwhich may be produced at alow cost of production. To this end themuffler may be made of sheet iron and the parts may be stamped therefromby suitable presses. Scrap sheet iron may be used for this purpose whichmakes the cost of production very small.

The invention may be contained in many forms of mulllers. I haveselected one form of a muffler which involves the use of my inventionand shall describe it hereinafter as an example of the various forms ofstructures thatmay be made and, yet, which contain the invention.

The mufiler selected, is illustrated in the drawings wherein-- Figure 1illustrates a perspective view of the muffler. Fi 2 illustrates asectional view of the mu er and Fig. 3 illustrates a pers ective andbroken view of a part of the mu er showing the interior construction.

1, Fig. 1, of the drawings is a cylindrical shell or casing which isprovided with the end disks 2 and 3 which close the ends of the shell 1.The disks 2. and 3 are provided with flanges 4 which may be secured tothe ends of the cylindrical shell 1 by spot welding the flanges 4 to theends of the shell. sleeve which may be inserted in an opening in the end2. The end 2 is provided with a The inlet 5 of the mufiier is ashortflange 6 which extends over and clenches with the enlarged innerend of the sleeve 5. A tube 7 is secured to the end 3 of the mufl lerand communicates with the interior of the cylinder 1 through an opening8 formed in the lower edge of the'end 3 of the mufller. The tube 7affords an outlet or exhaust of the mufiier. The end 3 is also providedwith a circular indented portion which is located axially in alinementwith the sleeve 5. Spherical shells 20 are also located coaxially withthe cell 1, the depressed or indented portion 15 of the end 3 and thesleeve 5. One of the shells 20 is provided with an extension 24 which isflanged between the sleeve 5 and the flange 6. Another of the shells 20clenches or sets over the edge 16 of the depressed portion 15. Thespherical shells 20 are secured together by means of flaring parts 22which extend into each succeeding shell and over the edge of theopenings 23 formed at the poles of the shells- The shells may be formedsemi-spherically and clenched together by overlapping edges 21 or by anyother suitable means.

The shells are provided with oblong openings 25 which permit the gasesthat enter the shells to escape gradually into the cylindrical shell orcasing 1. The openings 2 are arranged longitudinally around the openings23 located at the poles of the spheres. The size of the openings 25 issuch as to disseminate the pressure which is produced by the exhaust ofthe engine which is connected to the sleeve 5 and allow the ases togradually pass into the cylinder 1.

bus the gases pass out through the outlet 7. lVhen the explosion takesplace, the gas enters the first sphere 20 and the liberation permits thegas to form naturally into a spherical form. Ordinarily it would form asize larger than the sphere 20. The pressure, however, carries the gasliberated by the explosion into the next sphere through its opening 23in which the succeeding sphere is secured by the flaring flange 22. Hereagain the gas partakes of the spherical form as it escapes through theopening 23. The gas pressure is reduced by its escape through the oblongopenings 25 'found also in this sphere. The gas again being confinedescapes through the opening of the second sphere into the third spherewhere it again takes of the spherical form as it passes from theconfinement of the second sphere and part of it escapes through theopenings :25 contained in that sphere and so the operation is repeateduntil by the time the gas reaches the last sphere 20 the explosiveaction is reduced to nil and all of the gas has escaped through theopenings 25. The cross area of the cylinder 1 less the area of the majorcircle of the sphere is much larger than the inlet opening through thesleeve 5. The annular opening or space between the spheres and the shell1 is therefore more than sufficient to take care of the gases whichenter into the muffler. The gaseswhich escape through the openings ofthe spheres are thus delivered to the outlet of the muffler in asubstantially uniform current. my

The construction selected and described may be greatly varied in thearrangement and manufacture of its parts and in the substitution ofelements having equivalent functions and such modifications may be usedfor many varied purposes and still contain the invention. I

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is,

1. In a muffler, the combination of a cylindrical shell, a plurality ofhollow spheres located within the shell and in spaced relation withrespect to the shell and having large openings at the poles of thespheres and along the aXis of the shell and smaller openings arrangedlongitudinally around the spheres the muffler having an inlet connectedwith the interior of the first sphere through which the gases enter intothe muffler, the outer end of the end sphere being closed, the mufflerhaving an exhaust opening located in the end of the shell opposite tothe end having the inlet opening ing communications between the spheres,I

the muffler having an inlet opening communicatingwith the interior ofthe first sphere, the last of the spheres being closed, the sphereshaving oblong openings extending and arranged longitudinally which allowthe escape of gases into the shell, an exhaust opening located in theshell and without the end sphere.

3. In a mufller, the combination of a cylindrical shell, a plurality ofspherical shells located within the cylindrical shell and having polaropenings forming thereby a continuous passageway through the sphericalshells, the spherical shell at one end having an inlet opening, theother end one of the spherical shells being closed, the spherical shellshaving. oblong openings extending longitudinally which allow gases toescape into the cylindrical shell, the muffler having an outlet locatedin the end of the cylindrical shell opposite to the end having the inletto the first spherical shell and without the end spherical shell.

p In testimony whereof, I have hereunto signed my name to thisspecification NATHANIEL RAPP.

